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Small‐Angle X‐ray Scattering from Blends of PE and SBS. Observation of a Novel Kind of Deviation from Porod's Law
Author(s) -
Stribeck N.,
Ghioca P.,
Buzdugan E.
Publication year - 1997
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889897001556
Subject(s) - scattering , small angle x ray scattering , materials science , copolymer , wavelength , optics , space (punctuation) , physics , molecular physics , composite material , polymer , linguistics , philosophy
In a study of technical blends from poly(ethylene) and poly(styrene)–poly(butadiene) star block copolymers, reproducibility of the blending process and of the structural analysis is tested. A peculiar and reproducible deviation in the angular interval of the scattering curve is observed, which is governed by a decay according to Porod's law. The notion of a faint electron‐density undulation in space with a wavelength of 5 nm, an amplitude of 1 e.u. nm −3 and a range of 40 nm could explain the triangular peak observed in a plot which otherwise linearizes the scattering curve in the Porod regime.